Bormax® 2.0 WS prima with exchangeable center drill resp. Guide mandrel, such as two offset fluted main cutting edges as well as the gauged spurs with longitudinal grooves make significantly less feed forces necessary and minimize friction as well as the resulting heat development, included in delivery is a matching center drill and an Allen key, hexagonal shank for better power transmission, in combination with the pilot drills or guide mandrel1471 1619 best suited for oblique drilling, clean drilling in all softwoods, European hardwoods, chipboard and MDF